小洞沢川

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小洞沢川 flows into 宝川 , which it joins at N 36° 51′ 24″, E 139° 0′ 56″ at OSM node n759546880, and there 15 km of total upstream flows in. load it's distributaries

小洞沢川 has 1 tributaries.

• (unnamed), which joins it at N 36° 51′ 14″, E 139° 0′ 45″ at OSM node n760079353, and 748 m of total upstream flows in.
load it's tributaries